I don't know if your situation is really depressing or if you just portray it that way. I certainly get all depressed reading about these no-win situations.
They say that the married-singles lifestyle causes the problems in our marriages. And what I hear from you is all married-singles. He goes here and does this, then he goes there and does that, and I go here and do this, and then we fall into the bed at different times. You will graduate from Retrouvaille tomorrow, if the two of you can get from the places you are doing things separately to be there, which is in doubt.
But you and he don't seem to have gotten the hang of what they were saying at all. Because the two of you have not found a way to cut through the married-singles stuff and connect with each other. The family has to be a team, just one team, rooting for themselves. Not a divisive group of people glaring at each other. And you haven't gotten there yet.
I think you need to talk to your Retrouvaille advisors, and ask for their advice. I think he has said that he wants to save this marriage. But he, for whatever reason, doesn't stop the treadmill and get off. My suggestion is to go back to the books. Pull them out and dialogue. On a scale of one to ten, how important is our marriage to me. How do I feel about that? Or a question that you think will help you move forward. You are like shipwrecked sailors floating away from each other.